Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. inorganic material

Anotations

Scope note:

Pulverized material made from flux, sand or other refractory that has been fused with heat but not fully vitrified; often used in making glazes and may contain a coloring ingredient which will give the glaze coloring throughout.